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Article dans une revue

Stable Photoinduced Separated Charge State in Viologen Halometallates: Some Key Parameters

Abstract :

With the aim to define key parameters causing the photochromic properties of (MV)[Bi2Cl8] and (MV)(4)[Bi6Cl26] (MV2+, methylviologen; 1,1-dimethyl-4,4-bipyridinium), the effects of substituting Bi by Sb, Cl by Br, or MV2+ by MOV2+ (1,1-dimethoxy-4,4-bipyridinium) or MeMOV2+ (1-methyl-1-methoxy-4,4-bipyridinium) on the photoinduced charge transfer properties of such viologen halometallates are explored. It appears that only salts containing chlorobismuthate anions undergo a color change upon UV irradiation and that the nature of viologen entities has a key role in the process. We also suggest that a key parameter for observing the stable photoinduced separated charge state in chlorobismuthate viologen hybrids is a high chloride/viologen ratio, rather than the size of the anionic oligomer, as observed in the previously reported unique series (MV)((2n+2)/2)[Bi2nCl8n+2].

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https://hal.univ-angers.fr/hal-03344517
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Soumis le : mercredi 15 septembre 2021 - 10:07:45
Dernière modification le : jeudi 9 décembre 2021 - 15:46:06

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Nicolas Leblanc, Magali Allain, Nicolas Mercier, Lionel Sanguinet. Stable Photoinduced Separated Charge State in Viologen Halometallates: Some Key Parameters. Crystal Growth & Design, American Chemical Society, 2011, 11 (6), pp.2064-2069. ⟨10.1021/cg2003244⟩. ⟨hal-03344517⟩

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